
Quick answer — Hiroki Takahashi voices Kaihei Otouto in ONE PIECE FAN LETTER, Kenji Harima in School Rumble, Eiji Kikumaru in The Prince of Tennis and 61 more characters.




























































Hiroki Takahashi voices Kaihei Otouto (ONE PIECE FAN LETTER), Kenji Harima (School Rumble), Eiji Kikumaru (The Prince of Tennis), Impmon (Digimon Tamers), Katsuya Jonouchi (Yu-Gi-Oh!), Parco Folgore (Zatch Bell!), Takato Saijou (DAKAICHI -I'm being harassed by the sexiest man of the year-), Nihon (Hetalia World Series) and 56 more.
Kaihei Otouto is voiced in Japanese by Hiroki Takahashi.